There was a limitation with Mnesia that each file could only be 2GB at the most. Recently, it was announced, that there was a replacement for the underlying en

There was a limitation with Mnesia that each file could only be 2GB at the most. Recently, it was announced, that there was a replacement for the underlying engine for Mnesia called Tokyo Cabinet the removed the limitation. CouchDb seems fairly fast for large datasets--the caveat being, once the index is built on first access.